100 kW peak power external cavity diamond Raman laser at 2.52 μm

Giorgos Demetriou, Alan J. Kemp, Vasili Savitski

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We report an external cavity diamond Raman laser operating at 2.52 μm, pumped by a 1.89 μm Tm:LiYF4 (YLF) laser. The maximum pulse energy at 2.52 μm is 1.67 mJ for 4.4 mJ of pump, yielding a conversion efficiency of 38 %. The best slope efficiency is ~60% and the Raman pulse duration is between 11 and 15 ns for ~33 ns pump pulse duration. The peak power at 2.52 μm is >100 kW. This demonstration of a Thulium laser pumped diamond Raman laser paves the way for accessing the industrially important wavelength region of ~2.5 μm.
Original languageEnglish
Pages (from-to)10296-10303
Number of pages8
JournalOptics Express
Issue number7
Publication statusPublished - 28 Mar 2019


  • diamond Raman lasers
  • solid state lasers
  • short-wave infrared

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